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Titrations：滴定法.ppt

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该【Titrations：滴定法】是由【落意心冢】上传分享，beplayapp体育下载一共【19】页，该beplayapp体育下载可以免费在线阅读，需要了解更多关于【Titrations：滴定法】的内容，可以使用beplayapp体育下载的站内搜索功能，选择自己适合的beplayapp体育下载，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此beplayapp体育下载到您的设备，方便您编辑和打印。Titrations:滴定法StoichiometryThestoichiometryofanacid-ursinsolution(theyaredoubledisplacementreactions,afterall).Forexample,inthereactionofsodiumhydroxideandhydrogenchloride,1molofNaOHneutralizes1molofHCl:NaOH(aq)+HCl(aq)?NaCl(aq)+H2O(l)Stoichiometryprovidesthebasisforaprocedurecalledtitration,heconcentrationsofacidicandbasicsolutions.*,.*Inthetitrationofanacidbyabase,*Howisanacid-basetitrationperformed?,apHmeterisusedtomonitorthechangeinpHasthetitrationprogresses.*,,,whichisthepointatwhichmolesofH+ionfromtheacidequalmolesofOH-ionfromthebase.*Inthetitrationofastrongacidbyastrongbase,asteepriseinthepHoftheacidsolutionindicatesthatalloftheH+ionsfromtheacidhavebeenneutralizedbytheOH-changescoloratthisequivalencepoint.Noticethatphenolphthaleinandmethylreddon’tmatchtheexactequivalencepoint,buttheslopeissosteepthatitdoesn’tmatter.*Strong-,,,theacidisneutralizedandthesolution’+ionsfromtheacidhavebeenusedup,,theadditionofmoreNaOHagainresultsinthegradualincreaseinpH.*.*TitrationCalculations:,ordingtothisequation:H2SO4(aq)+2NaOH(aq)?Na2SO4(aq)+2H2O(l)CalculatethemolesofNaOHinthestandardfromthetitrationdata:molarityofthebase(MB)andthevolumeofthebase(VB).Inotherwords,MBVB=(mol/L)(L)=molNaOHinstandardFromtheequation,youknowthatthemoleratioofNaOHtoH2SO4is2:=molNaOHinstandardx(1molH2SO4/2molNaOH)=molH2SO4titrated/VA*

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